Shuttle driver for sewing machines



N. McKENZIE. SHUTTLE DRIVER FOR SEWING MACHINES.

APPLICATION FILED MAY l7, I9l9- Patented Apr. 13,. 1922.

W m N Arroimrs 1 I UNITED STATES NEIL MCKENZIE, or snow s'gn MARIE, MICHIGAN.

SHUTTLE nnrvnn non snwme MACHINES.

Application filed.

To all whomz't may concern: V

Be it known that I, NEIL MoKnNzrn, a citizen of the Dominion of Canada, (having declared his intention to become a citizen of the United States, and application now filed for full citizenship,) and a resident of Sault Ste. Marie, in the county of Chippewa and State of Michigan, have invented certain new and useful Improvements in Shuttle Drivers for Sewing Machines, of which the following is a specification.

This invention relates to an improvement in shuttle drivers for sewing machines, and

more particularly to an improved shuttle driver for the type of sewing machine used in the shoe-making art.

The particular object of the invention is to provide a novel shut-tle driver of a strength consistent with the strength of the other parts of the machine, and one in which it is impossible to assemble the parts of the driver other than the correct way. It hasbeen found in practice that the shuttle driver forms the seat of most sewing machines of the type to which my invention is applicable, and I aim to eliminate this trouble by providing an improved shuttle driver of such sturdy construction and simplicity, as to minimize the danger of breaking down during use.

A further object of the invention is to provide a shuttle driver of such construction that the wear may be instantly taken up without disassembling any'part of the machine.

The invention is particularly adapted for use with shoe sewing machines, and more particularly for use with machines of this type which employ a rack mechanism for imparting motion to the shuttle driver, of the type, for instance, shown in the patent to A. Ploss, No. 171,485, of December 28, 187 5.

l/Vith these and other objects in view which will become apparent as the description proceeds, the invention resides in the construction, combination and arrangement of parts hereinafter more fully described and claimed, and illustrated in the accompanying drawing in which like characters of reference indicate like parts throughout the several figures of which:

Figure 1 represents a view in elevation of a shuttle driver constructed according to my invention, showing the shuttle carrier in place thereon.

Specification of Letters Patent. Patented A111. 18, 192 2- of the trouble with May 17, 1919,. emi No. 297,757.

1 Figure 2 represents a view in section taken onthe plane indicated by the line 2-2 of Figure 1.

Figure 3 represents a vertical sectional view taken through the device.

Figure 4: represent a plan View of the driver, the carrier being removed.

Figure 5 represents a fragmentary sectional view showing the use of a set screw in retaining the shuttle driver in place.

Referring more particularly to the drawing, I equipped the shuttle carrier 1 with a shank 2 of rectangular cross section, said shank being rounded on one side as at 3. The shank fits into a similarly shaped opening 4 extending longitudinally through a cylindrical body portion 5 of the shuttle driver 6. This driver includes a flange 7 formed integrally with the body.5, and cut away to form the teeth or gear segment indicated generally at 8.

The shank 2 extends beyond the lower end of body 5 of the shuttle driver, and it is threaded to receive an annular nut 9 which is provided with recesses 10 for receiving a spanner wrench whereby the nut may be turned on to or off of the lower threaded end 01 the shank. A lock washer 11, interposed between the nut and the body of the driver retains the nut against accidental displacement.

By having the shank of the shuttle carrier, and the opening in the driver through which the shank extends, of the irregular form shown, there can be no chance of assembling the parts in improper relation. Any wear accruing may be instantly taken up by tightening which will readily be appreciated by those skilled in the art, it having been heretofore a material disadvantage accruing to types of shuttle drive means in common use, that lost motion occurring in the drive means could be taken up only by loosening and carefully readjusting the various parts, a process which required considerable time, and considerable ingenuity in rearranging the parts in' the same position relatively to each other which they originally occupied.

in the form shown in Figure 5, I use, instead of the nut and lock washer, the set screw 12 and a lock washer 13, the set screw having its shank threaded into the lower end of the shank of the shuttle carrier, as clearly shown.

Although I have described the preferred the nut 10, an advantage embodiments of myinvention, I may desire to make such changes in the construction, combination and arrangement of parts thereof, as do not depart from the spirit of the invention and the scope of the appended claim.

I claim 2- e V p In a device of the character described, in combination, a shuttle carrier having a shank formed With three plane and one rounded sides, a shuttle driver'including a body portion comprising a sleeve provided with a lat- .7

eral fiangehaving a portion formed to con-- capable of assembly with said shuttle carrier in only one angular relation with re spect thereto, said shank being slidably re ceived in the opening of the sleeve in assembly, and means for adjustably retaining the driver' in place on-the shank. V

NEIL McKENZIEQ 

